Prohibited Medication in Pregnancy

The following list is a very complete list however you do not need to know all of them for USMLE, just read it once, what ever sticks your memory would be fine:
ACE inhibitors (eg, captopril, enalapril) - D
Acetohydroxamic acid (AHA) - X
Aminocaproic acid - D
Androgens (eg, Danazol) - X
Angiotensin II receptor antagonists (eg, losartan, valsartan) - D
Antineoplastics (alkylating agents) - D
Antineoplastics (antimetabolites) - X
5-Fluorouracil
Methotrexate
Methylaminopterin
Cytarabine
Aminoglycosides (eg, gentamicin, streptomycin) - D
Aspirin - D
Busulfan
Chlorambucil
Azathioprine
Cyclophosphamide
Mechlorethamine
Cisplatin
Bleomycin
Atenolol - D
Benzodiazepines - D and X
Flurazepam (X)
Temazepam (X)
Triazolam (X)
Bromides - D
Carbamazepine - D
Colchicine - D
Corticosteroids - C
Danazol - X
Diethylstilbestrol - Not on market
Ergotamine - X
Finasteride - X
Fluconazole - C
Folic acid antagonists
Phenytoin - D
Methotrexate - X
Lithium - D
Methimazole - D
Methylene blue - C
Mifepristone, RU-486 - D
Minoxidil - C
Misoprostol - X
Mysoline - D
Penicillamine - D
Phenobarbital or methylphenobarbital - D
Potassium iodine and medications that effect iodine levels (diatrizoate) - D
Progestins - X (except megestrol and norethindrone - D)
Raloxifene (Evista) - X
Retinoic acid, isotretinoin (Accutane), acitretin (Soriatane), etretinate, topical tazarotene - X
Statins (3-hydroxy-3-methylglutaryl coenzyme A [HMG-CoA] reductase inhibitors) - X
Tamoxifen - D
Tetracycline - D
Thalidomide - X
Valproic acid - D Warfarin - X